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CompTIA Network+ 1.4 Cisco CCST Networking 1.5 CompTIA A+ Core 1 2.1 CompTIA Network+ 1.1 Cisco CCST Networking 1.1 CompTIA Tech+ 2.7
TechKnowSurge Catalog Interactives Order or Format?
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Order or Format?

Is each rule about the order of the conversation, or the format of a message? Sort the rules.

⚑ Complete this interactive to capture a CTF flag worth 5 points.

About this interactive

Two machines that talk to each other can be very different: a Windows laptop and a Linux server, a phone and a desktop, Chrome on one end and a service someone else wrote on the other. A protocol is the set of rules they both follow, so they can communicate anyway. The lesson uses TechKnowDJ's app. It asks the server for the list of songs, and the server replies with them. What actually crosses between the two is only a string of 1s and 0s, so the rules have to settle two things. Order of communication: the sequence of the exchange. Perhaps the app says hello, the server says hello back, the app asks for the songs, and then the songs are sent. Are they sent all at once, or one at a time? The protocol decides. Message format: the layout inside a message. Each song has a name, an album, an artist, perhaps artwork and lyrics. If the two ends disagree on the order of those fields, the app shows the album as the song's name. Two more points from the lesson. You would not invent your own protocol for an app like this; you would use protocols that already exist. And many protocols are at work at once, in layers, for even one request.

What you'll learn

Aligned to

CompTIA Network+
1.4 Explain common networking ports, protocols, services, and traffic types.
1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model.
Cisco CCST Networking
1.5 Describe common network applications and protocols
1.1 Identify the fundamental conceptual building blocks of networks
CompTIA A+ Core 1
2.1 Compare and contrast Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports, protocols, and their purposes.
CompTIA Tech+
2.7 Explain basic networking concepts.

Key terms

Protocol
A set of rules governing the format and transmission of data between devices.
Order of Communication
The defined sequence of steps or exchanges that must occur between devices to establish and maintain communication.
Message Format
The structured arrangement that defines how data fields are organized within a transmitted message so both sender and receiver interpret the data correctly.
Binary
The base-2 number system that uses only the digits 0 and 1; the native language of digital computers, which store and process data as electrical on/off states.

Topics

Protocol Order Of Communication Message Format Interactive Categorize

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